Results: The table shows the correlation between methods
There were 73 subjects with (X±SD) age 42.6±9.9 yrs & BMI=31.7±3.1 kg/m2. Mean group weight loss was 5.4 kg.
A correlation matrix with r values for fat mass is shown in table. Both clinical methods were significantly correlated with UWW and DXA, with BIA r’s > than Anth. The fraction of weight loss as fat was established for each method by regression: .79 DXA (R2=.83); .77 BIA (.88); .70 UWW (.69); and .57 Anth (.65).
Results: These results suggest clinical methods, notably BIA, correlate with and provide similar composition of weight loss results to research-based body composition methods.
Comments and Key points
This is quite a simple and useful poster, presented at a scientific meeting, and reproduced on the Tanita Corporation website1.
It shows that Bio-Electrical Impedence is better than Fat thickness measurements ( anthropometry) for measuring a persons body fat percentage.
Bio-Electrical Impedance is " Bioimpedance analysis " or BIA. BIA has 83 to 88% correlation with the expensive reference methods of Underwater weighing or Dual-photon X-ray Absorptiometry ( DXA ). That’s pretty good… as good as the correlation between UWW and DXA at 82%.
The Tanita body fat monitor scales use bio electrical impedence methods. The are used in homes, gyms and in scientific research studies.